AMD Age related Macular Degeneration, wet or dry according to the presence of sub-retinal fluid / haemorrhage.

POAG, Primary Open Angle Glaucoma. (commonest type of glaucoma)

HRT, Heidelberg Retinal Tomogram. A type of optic disc tomography which provides a 3D image of the optic nerve head, to aid diagnosis and follow-up of glaucoma, see YouTube Video of an HRT recording of glaucomatous disc.

YAG, neodymium-doped Yttrium Aluminium Garnet, a type of crystal used to generate LASER. This laser is usually used for photodisruption when treating posterior capsular opacification (PCO), or for making a hole in the iris to prevent angle closure glaucoma, Peripheral Iridotomy (PI)